TEXAS · WELLS · PECOS COUNTY · ALLISON 4 LEASE · API 42-371-38652 · DISTRICT 7B
Allison 4 #603
Pecos County · Pinon (Overthrust) field · Producing · Vertical
Allison 4 #603 (API 42-371-38652) is a well in Pecos County operated by Longfellow Energy LP, completed September 29, 2010 and listed as producing on the RRC schedule, shut in May 1, 2024.
The RRC has issued one drilling permit, issued March 4, 2010, permitted to 13,610 ft.
It was permitted by Sandridge Expl. And Prod., LLC and has since transferred to Longfellow Energy LP on the wellbore schedule.
Completion filings report 3 formation tops, including Base Cretaceous (marker), Dimple, Tesnus.
Its lease has reported 2.07K barrels of oil and 18.1M mcf of gas since September 2010, last reporting volume in April 2024.
Operator of record
Permitted by Sandridge Expl. and Prod., LLC; the EWA schedule now lists a different operator.
- Based in
- Dallas, TX
- P-5 status
- Active (A)
- P-5 last filed
- Mar 26, 2026
- Permits on file
- 38
- Phone
- (972) 590-9900
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Longfellow Energy LP |
| Production reports | Longfellow Energy, LPthrough Apr 2024 |
| Latest permit | Sandridge Expl. and Prod., LLCMar 4, 2010 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 13,610
- total depth, ft
- 1
- permits on file
- Mar 4, 2010
- last permit issued
- Sep 29, 2010
- completed
- 2.07K
- cumulative oil, bbl
- 18.1M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Sep 2010 THROUGH Apr 2024
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Sep 29, 2010
- Shut in
- May 1, 2024
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
Surface location
No coordinates on the permit record yet. The RRC's GIS record usually lands within days of issuance; historical master-file permits never carry one.
Lease production
PDQ LEASE REPORTS · REPORTED THROUGH APR 2026
Texas reports oil by lease, not by well. These are the lease this well is completed on; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Allison 4 G-10-274620 | Pinon (Overthrust) | Longfellow Energy, LP | 1 | 2.07K | 18.1M | Sep 2010 – Apr 2024 |
Gas, mcf lease total
Last 12 months 0 · prior 12 0
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Sandridge Expl. and Prod., LLCSep 2010 → Feb 2016
- 2Occidental W TX Overthrust, Inc.Mar 2016 → Dec 2021
- 3Longfellow Energy, LPJan 2022 → Apr 2024
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 692111-99 | Drill | Sandridge Expl. and Prod., LLC | Mar 2, 2010 | Mar 4, 2010 | Mar 29, 2010 | 16,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Sep 29, 2010 | Allison 4 G-10-274620 | Pinon (Overthrust) | Longfellow Energy LP | Producing · shut in May 1, 2024 | 13,610 |
Formation tops
As filed on W-2/G-1. Subsea from 4,257 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Base Cretaceous (marker)BASE CRETACEOUS | 1,320 | 2,937 |
| Dimple | 3,820 | 437 |
| Tesnus | 4,490 | -233 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,243 | 9,939 | Perforated |
| 10,220 | 10,285 | Perforated |
| 11,730 | 11,985 | Perforated |
| 13,194 | 13,332 | Perforated |
| 13,392 | 13,466 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 1,128 | 12.25 | 780 S |
| 7 | 9,753 | 8.75 | 640 S |
| 4.5 | 13,597 | 6.125 | 470 S |
Completion filings
W-2 and G-1 reports on record in the RRC wellbore file, newest first. The suffix identifies the wellbore or completion event. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Nov 19, 2014 | Aug 25, 2014 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Dec 7, 2017. Gamma ray. These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.
Open the RRC's log search for this well ↗| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| Gamma RaySpans Base Cretaceous (marker), Dimple, Tesnus | 3 TIFF | 1,120 to 7,960 | Dec 7, 2017 | 2.91 + 3.27 + 40.0 |
"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.
The source documents
Petrora holds the structured record. The scanned filings live at the RRC; these links open its search already filled in for this API.
- Wellbore filings for 42-371-38652 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-371-38652 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it. The University Lands library has no per-well link: then paste it into its search.
About this data
Permits from the RRC OGA049M master and daily daf420 files; wellbore and operator of record from the EWA schedule, weekly; completions, formation tops, casing, and perforations from the dbf900 wellbore file; production from PDQ lease reports, which lag two to three months; injection from UIC permits, H-10 reports, and TexNet daily volumes; earthquakes from the TexNet catalog.
New to these records? How to read a well page · API numbers · completion reports and tops · why production is by lease
Developers: this page as JSON is GET /v1/data/wells/37138652, documented in the API reference.